Often, governments are the providers of public goods in an economy. If the government wishes for its provision of public goods to be efficient, which of the following best describes how these goods should be provided? a. Governments should provide the quantity that taxpayers request. b. Private markets should supply these goods because government provision is inefficient. c. Governments should provide the quantity at which marginal cost equals marginal social benefit. d. Governments should provide the good until no one else wishes to consume it.

Because of the violent nature of the sport, professional american football players are at risk of suffering concussions (or brain injuries) during the violent collisions that occur between players during the game. violent collisions involving hits to the head are particularly risky. suppose the commissioner of the national football league (nfl) institutes a rule requiring players to wear a new, lighter helmet that is designed to reduce head trauma during collisions between players on the field. while the new helmets the probability of a concussion resulting from each individual collision, at the same time the new helmets could also give football players an incentive to play more , which could potentially the amount of violent collisions and thus the number of concussions suffered by nfl players, all else equal.